mason



' 2 Sheets -Sheet 1.

Y {No Model.) v

M O y LOOK FOR FIRE ARMS.

Nb. 248,190. Patented 001;. 11,18 81..

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UNrrEo Y STATES PATENT FFYIGF. f

i WILLIAM MASON, or nan'rronn, oonnnorioor, AssIeNon TO THE ooLrs PATENT FIRE-ARMS MANUFACTURING COMPANY, or same PLACE.

L/QCK FOR FIRE-ARMS.

"SPECIFICATION forming part of Letters-Patent No. 248,190, dated October 11, 1881.

Application filed June 13, 1881. (No model.)

1 To all whom at may concern:

Be it known that I, WM. Mason, of Hart ford, in the county of Hartford and State t" Connecticut, havein vented new Improvements 1n Revolvers; and I do hereby declare the following,when taken in connection with the accompanying drawings and the letters of ref--- -the parts in position immediately after discharge and before the trigger is released.

This invention relates to an improvementin revolvers, with special reference to the lock. mechanism and to that class which is con-,

. structed so that the hammer may be thrown 1 back and discharged by a single pull of the trigger, or be cooked by hand and then released by-the trigger; and the invention consists in the construction as hereinafter described, and particularly recited in the claims.

A represents the frame, constructed to receive the lock mechanism and with a cylinderrecess, B, in substantially the usual manner; G,the hammer, hung upon apivot, a, provided with the mainspring D, also in substantially the usual manner.

E is the trigger, hung upon a pivot, b, in the frame, and so as to swing freely thereon. 0n the back of the trigger is a seat, (1, in which sets a dog, e. This dog is shown detached,lin perspective, in Fig. 3. It is constructed with shoulders f to rest in the seat d, and below these shoulders is a. hook-shaped projection, 7:,which lies in a recess in the trigger, between the bearings for the dog, as seen in Fig. 4-. The book h, opening to the rear, forms a seat at thelower end for a strut, t, on which a spring, F, bears. The action of the spring on the dog tends to throw its nose m to the rear, and also, through the bearings of the dog on the trigger, tends to throw the trigger forward, as seen in Fig. 4, to its normal position. The nose at of the dog, when the trigger is pulled, will engage so with an arm, a, on the hammer, forward of the pivot, and so that by pulling upon the trigger 5, and 7, detached views; Fig. 6, side view of:-

that arm n of the hammer will he raised and the hammer correspondinglythrown to the rear until the hammer escapes from the dog.

H is the pawl for rotating the cylinder; It 5 is hung to the'npper arm of the trigger, as at 01. As the trigger is pulled from the position seen in Fig. 1 to that seen in Fig. 2, the pawl follows the cylinder in the usual manner, work ingin the ratchet thereon, and as it rises it 6: turns on its pivot 1'. Below the pivot r a shoulder, s, is made on the pawl H, which works against a corresponding shoulder, t, on the dog .0, whereby the swinging movement of the pawl H is imparted to the dog e-that is to say, as the shoulder .9 of the pawl advances toward the cylinder it turns the upper end or nose of the dog a in the same direction,so that as'soon as the hammer has beenthrowri back by thepull upon the trigger to the position of full-cock,

as seen in Fig.2, the nose of the dog 0 has been forced so far forward as to escape from the arm n of the hammer, and thereby permit the hammer to fly forward, by the force of the mainspring, to the firing position, as seen in Fig. 6. in this movement the spring F, bearing upon the dog, and through the dog upon the pawl H below its pivot, serves to force the nose of the pawl forwardinto contact with the ratchet in the cylinder, and yet yield as the pawl and trigger return from the positiouin Fig. 6 to that in Fig. 1, so as to pass the next tooth on the ratchet, and thus the spring also serves indirectly as the pawl spring. As soon as the trigger is released after lirin g, the upper arm I of the trigger strikes the bod of the hammer at a point, a, above the pivot. This end I of the trigger is fitted with an anti-friction roll to work against the surface of the hammer from the point a downward. The shape of that surfacc--from the point a downward-is such relatively to the pivot b of the trigger that as the arm I descends by theforce of the trigger-spring F it will press the hammer backward to the position seen in Fig. 1, 9 5 so as to take it away .from the firing-pin (or,

if not a firing-pin, the point of the nose of the hammer back from its most forward position) and out of the path of the head of the next advancing cartridge, and so that the pressure of the hammer in its normal condition will be entirely removed from the cartridge in the cylinder. Thus the spring F performs its fourth oflice-viz., to retreat the hammer after firing.

On the side of the upper arm of the trigger, next the hammer, is a shoulder, to, a little above the nose of the dog 0, and when the hammer is drawn back by the thumbin the usual manner, the arm n will be engaged by the said shoulder to, as seen in Fig. 7, to be released therefrom by the pulling of the trigger, also in the usual manner.

The forcing back of the hammer by the return of the trigger, as described, is performed independent of the dog and pawl, and hence may be employed in a lock in which neither a pawl nor dog'is required, nor in which'the pawl is operated in the usual or other independent fire-arms have been made so that'the hammermay be'cock-ed and released by the trigger, or

cooked by hand and engage the trigger so as to stand at full-cock. I therefore do not wish to'be understood as broadly claiming such-eonstruction.

I am also aware thata trigger has been con structed to operate as a sear to engage the hammer when set at fulheock, combined withv a stirrup, by which the hammer may be cooked by pull-in g the trigger. I-thereforedo' notclai msuch construction; but

What I do claim is 1. The combination of the trigger E, constructed with a seat, d, on its rear, the dog 6, constructed with shoulders to rest in said seat on the trigger, and with a projection, 7b, rearward from its bearing on the trigger, the spring F, arranged to bear upon the said projection h on the dog, and the hammer constructed with an arm forward of its pivot, with which the said dog will engage, substantially as described.

2. The combination of the trigger E, constructed with a seat, d, on its rear, the dog 6, constructed with shoulders to rest in said seat on the trigger, and with a projection, h, rearward from its bearing on the trigger, the spring F, arranged to bear upon the said projection h on the dog, and the hammer constructed with an arm forward of its pivot, with which the said dog will engage, the said trigger also constructed with a shoulder, to, above the nose of the dog, and the hammer with a corresponding notch above the point where the dog engages the hammer, substantially as and for the purpose described.

3. The combination of the trigger and hanr mer with the dog 6, seated on the trigger, and the trigger-spring arranged to operate both the trigger and the dog, the upper arm of the trigger arranged to bear upon the body of the hammer'above it's pivot, so as to force the hammer backward as the trigger is released, substantially asdescribed.

4 The combination of the trigger and hammer with the dog 0, seated on the trigger, the

cylinder-pawl h'ung to the trigger above the 

